Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
A147951
Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =74a(5) =304a(6) =1424a(7) =7946a(8) =39908a(9) =223514a(10) =1294348a(11) =8736910a(12) =58707788a(13) =401926462a(14) =3287231046a(15) =25868828516
External references
- oeis: A147951